Endless coated abrasive article

Details Endless coated abrasive article Endless coated abrasive article

B - Operations, Transporting

24

B

B24B 21/00 (2006.01) B24D 7/00 (2006.01) B24D 11/06 (2006.01)

Patent

CA 2074196

ABSTRACT OF THE DISCLOSURE This invention relates to endless coated abrasive articles, in particular, coated abrasive belts having a splice made by means of radiation curable adhesives. The conventional method for making an endless coated abrasive article, i.e., a belt, involves the steps of cutting a coated abrasive sheet to the desired length, applying a splice adhesive over both cut ends of the side of the coated abrasive sheet not bearing abrasive, allowing the coated abrasive sheet to stand for a sufficient time to allow the solvent to flash off from the adhesive, abutting the two cut ends of the coated abrasive sheet to form a joint, applying a splice medium over the joint, and solidifying the splice adhesive. The splice adhesive is typically solidified by heat and pressure. The time required for the solvent to flash off can range anywhere from five to 60 minutes, thereby creating a bottleneck in the manufacturing process. Furthermore, removal of the solvent gives rise to environmental concerns. This invention provides a method of making the splice by using radiation curable adhesives, e.g., acrylated urethanes, and radiation energy to cure the adhesives. The radiation curable splice adhesive is essentially solvent-free. Consequently, the time required for the solvent to flash off is eliminated and solvent removal is no longer an environmental concern. By utilizing a source of radiation energy, the splice adhesive can be solidified in less than one minute. Because the splice adhesive is fully solidified, coated abrasive belts can be packaged immediately after the splice is formed. 45568-7A.EPO

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